Investigators have been working the case for five months, Ashbaugh said, and have identified three additional victims, who were between 13 and 16 years old at the time the alleged crimes occurred. Ashbaugh said that Matthews used force in two cases, and one of the incidents occurred in a van parked outside the Forest Grove skateboard park.

Matthews is homeless, Ashbaugh said, and has mainly stayed in the Forest Grove area. Investigators are looking for any additional information about the cases, other potential victims and Matthews' location during the past year.

Anyone with more information is asked to call the Forest Grove Police Department at 503-992-3260.